Cod sursa(job #3005556)

Utilizator Radu_BicliBiclineru Radu Radu_Bicli Data 17 martie 2023 08:46:01
Problema Litere Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.34 kb
Raporteaza aceasta sursa 
#include <bits/stdc++.h>

using namespace std;

ifstream fin("litere.in");
ofstream fout("litere.out");
int n, i, j, r, fr[36];
char c;

int main() {
    fin >> n;
    for(i = 1; i <= n; i++) {
        fin >> c;
        for(j = c + 1; j <= 'z'; j++) r += fr[j - 'a'];
        fr[c - 'a']++;
    }
    fout << r;

    return 0;
}